How much does a 1.00 to 1.49ct I SI1 lab grown oval diamond cost?

As of September 2026, 1.00 to 1.49ct I SI1 lab grown oval diamonds typically cost HK$5,883 HKD to HK$16,244 HKD, with a median price of HK$10,433 HKD. There are currently 228 diamonds matching this specification available across retailers.

Where can I find the best price on a I SI1 oval diamond?

Compare prices across retailers on Carat Hunter to see all your options.

1.00 to 1.49ct I SI1 Lab Grown Oval

Quick answer

As of September 2026, there are 228 lab grown oval diamonds with I colour and SI1 clarity in the 1.00 to 1.49ct range available across retailers worldwide. Prices typically run HK$5,883 HKD to HK$16,244 HKD, with a median of HK$10,433 HKD. At least 20 retailers stock this exact specification. Half of all listings fall between HK$6,229 HKD and HK$14,244 HKD per carat. The same specification in natural form lists at a median of about HK$23,321 HKD per carat.

Three of the best scored stones at this specification right now:

Caratlytics Diamond Price Index, August 2026: natural diamonds at 2,184 USD per carat and lab-grown at 464 USD per carat, a natural to lab ratio of 4.7 to 1. Oval lab grown stones in the index: 487 USD per carat, -11.2% month on month. See the full index release

Figures come from live listings across more than 100 retailers and refresh daily. The index is a monthly release.

Last updated: September 2026

Available

228

Lowest Price

HK$2,181 HKD

Highest Price

HK$72,364 HKD

Average Price

HK$11,547 HKD

Market Intelligence

Retailers Selling

Price Spread

77.0%

Price Range

Price per carat distribution across retailers

$1,327/ct

10th Percentile

$745

Median

$1,327

90th Percentile

$2,409

Score Distribution

228 diamonds scored across 4 quality tiers

Excellent

12 (5.3%)

Very Good

97 (42.5%)

Good

100 (43.9%)

Average

19 (8.3%)

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Related Specifications

D IF D VVS1 D VVS2 D VS1 D VS2 D SI1 E IF E VVS1 E VVS2 E VS1 E VS2 E SI1 F IF F VVS1 F VVS2 F VS1 F VS2 F SI1 G IF G VVS1 G VVS2 G VS1 G VS2 G SI1 H IF H VVS1 H VVS2 H VS1 H VS2 H SI1 I IF I VVS1 I VVS2 I VS1 I VS2 I SI1